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Wednesday, November 15, 2017

Getting the Seasons Officially Wrong: A Case of a Category-Mistake

Joel Achenbach of the Washington Post has not quite turned the corner with respect to spring, and the seasons in general. You see, “season” is used in two distinct though related ways in English. It can refer to four distinct weather/plant-life conditions or to the four parts of the earth’s orbit around the sun. Given the tilt of the Earth, the two are related but they do not occur together. While Achenbach acknowledges that the vernal equinox typically on March 21st “is a moment of time specified by the motion of the Earth around the sun,” he refers to this as the official start of the meteorological spring. In actuality it is not. In the Northern Hemisphere, meteorologists record data from December, January and February as winter and March, April and May as spring. So in March 2012, meteorologists could already conclude that the preceding winter had been the fourth warmest since the record-keeping began.

The full essay is at "Confusing the Seasons."